Pengaruh Gempabumi Tektonik Terhadap Aktivitas G. Gede

Sri Hidayati, Cecep Sulaeman, Supartoyo Supartoyo, Estu Kriswati

Abstract


In addition to home for seven active volcanoes, West Java, is also having high tectonic activity, owing to its close distance from subduction zone and crustal fault. The Cimandiri Fault extends about 100 km from southwest to the northeast ward through Sukabumi area. Gede Volcano with high seismic activity is sitting 20 km north of Cimandiri Fault. Shallow earthquakes often occur around Gede volcano and their sources are fairly close to the Cimandiri valley. Feltearthquakes occurred in 2007, 2010, 2012 and 2014,where the source supposed to be around Cimandiri valley,were followed by volcano-tectonic (VT) earthquake swarms in Gede Volcano. These swarms probably indicate that there is a linkage between tectonic and Gede volcano activities. However, the swarms were followed by less significant changes in volcanic activity. GPS data during measurement period of 2006-2015 show the existence of a fault with main stress in the northwest-southeast direction. The mechanism of the Cimandiri Fault is reverse fault with sinistral slip component and sinistral strike slip fault, while the swarm of VT earthquakes in Gede Volcano is dominated by reverse and normal faults. Tectonic earthquakes may trigger nearby volcanic eruption; it depends on the state of magma of the volcano and the magnitude of the earthquake.

Keyword: Tectonic, Cimandiri fault, VT earthquake, Gede Volcano.

Full Text:

PDF

References


Basuki, A, Iyan Mulyana, dan Estu Kriswati., 2013.Laporan penelitian G. Gede, Jawa Barat. Laporan internal Pusat Vulkanologi dan Mitigasi Bencana Geologi, Bandung (tidak terbit).

Battaglia, J., Metaxian, J.P. and Garaebiti, E., 2012. Earthquake-volcano interaction imaged by coda wave interferometry. Geophysical Research Letter, 39(11).

Bemmelen, R.W., 1949. The geology of Indonesia,Vol. I A.The Hague Martinus Nijhoff.

Bronto, S. dan Langi B.S., 2016. Geologi Gunung Padang dan sekitarnya, Kabupaten Cianjur, Jawa Barat. Jurnal Geologi dan Sumberdaya Mineral, Vol.17 No.1, 37-49.

Daryono, M.R., 2016. Paleoseismologi tropis Indonesia dengan studi kasus di Sesar Sumatra, Sesar Palukoro-Matano, dan Sesar Lembang. Ph.D Thesis, Institut Teknologi Bandung.

Hidayat, D., Gunawan, H., Hendrasto, M., Basuki, A., Schwandner, F., Marcial, S., Newhall, C., and Kunrat, S., 2013.Tectonic or magma intrusion? New result from the analyses of seismic swarm at Gede and Salak Volcano, West Java, Indonesia. Oral presentation, IAVCEI 2013, Kagoshima, Japan, July 20-24, 2013.

Hill, D.P., Pollitz, F., and Newhall, C., 2002. Earthquake-volcano interactions, Physic Today 55(11): 41-47.

Iguchi, M., Suantika, G., Sulaeman, C.,Wildan, A., Sutawidjaya, I.S., Kriswati, E., Kristianto, Solihin, Surono, dan Triastuty, H., 2001. Source mechanism of volcanic earthquakes at some volcanoes in Indonesia. Proc.Annual Disaster Prevention Research Institute, Kyoto University. Kyoto, Japan.

Kriswati, E., 2015. Interaction system between tectonic strain and increase in volcanic activity. Ph.D Thesis. Institut Teknologi Bandung.

Kusumadinata, K., 1979. Data Dasar Gunungapi Indonesia , Direktorat Vulkanologi. Bandung: 810 h.

Manga, M.and Brodsky, E.E., 2006. Seismic triggering of eruptions in the far field: volcanoes and geysers. Annual Reviews of Earth and Planetary Sciences, 34: 263-291.

Marliani, G. I, 2016. Neotectonic of Java, Indonesia: Crustal deformation in the overiding plate of an orthogonal subduction system. PhD Thesis, Arizona State University.

Mulyadi, D, dan Suantika, G., 1992.Pengamatan seismik dan pengukuran suhu G. Gede Jawa Barat Juni – Juli 1992. Laporan internal Direktorat Vulkanologi (tidak terbit).

Nakamura, K., 1975.Volcanic eruption caused by squeeze up of magma due to compressive tectonic stress. Bulletin of theVolcanological Society of Japan, 20(2): 116p.

Saepuloh, A., Urai, M., Meilano, I., and Sumintadireja, P., 2013. Automatic extraction and validation of linear features density from ALOS PALSAR data for active faults and volcanoes. Proceeding of the International Symposium on Remote Sensing, Chiba, Japan.

Sidarto, 2008. Dinamika Sesar Citarik. Jurnal Sumberdaya Geologi dan Mineral, 18(3): 149-162.

Situmorang, T dan Hadisantoso, R.D.,1992. Peta Geologi G. Gede, Cianjur, Jawa Barat. Direktorat Vulkanologi, Bandung.

Supartoyo, Surono dan E.Tofani, 2014. Katalog gempabumi merusak Indonesia Tahun 1629-2014. Pusat Vulkanologi dan Mitigasi Bencana Geologi, Bandung: 133

Supartoyo, Suparka, E., Abdullah, C.A., dan Sadisun, I.A., 2012. Identifikasi karakteristik dan aktivitas Sesar Cimandiri untuk mendukung upaya mitigasi bencana gempabumi di Kabupaten Sukabumi Provinsi Jawa Barat. Jurnal Vulkanologi dan Mitigasi Bencana Geologi, 2(2): 15-23.

Walter, T.R., and Amelung, F., 2007. Volcanic eruptions following M≥9 megathrust earthquakes: Implications for the Sumatra-Andaman volcanoes. Geology, 35: 539-542.

Walter, T.R., Wang, R., Zimmer, M., Grosser, H., Lühr, B.G., and Ratdomopurbo, A., 2007. Volcanic activity influenced by tectonic earthquakes: static versus dynamic stress triggering at Mt. Merapi, Indonesia. Geophysical Research Letters,34: 1-5.




DOI: http://dx.doi.org/10.33332/jgsm.geologi.19.4.209-216

Refbacks

  • There are currently no refbacks.


Copyright (c) 2018 Sri Hidayati, Cecep Sulaeman, Supartoyo Supartoyo, Estu Kriswati

Indexing Site :
Google Scholar ISJD LIPI Portal Garuda IPI

Sinta(Science and Technology Index) Garuda(Garda Rujukan Digital Crossref


Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

View JGSM Statistics